Hill, Katherine Elizabeth, 1912- Exploring the natural world with young children / [electronic resource] / Katherine E. Hill.. — New York : : Harcourt Brace Jovanovich,, c1976.. — 154 p. : : ill. ; 23 cm.
Includes index.
0153622512 9780153622519
76362022
Science--Experiments. Science--Study and teaching (Elementary) Sachunterricht.